Analyzer



y 1962 B. 0. AYERS 3,043,l28

ANALYZER F11ed Se t 17 1958 2 Sheets-sheat 1 TEMPERATURE CONTROLLERS INVENTOR^ 3-0- AYERS From the foreg0ing description it Should be evident that there is provided in accordance vvith this invention an improved furnace for use with a therm0chromat0 graphic analyzer' This furnace iS capable of establishing a linear tenperature gradient betvveen the tw() endS there 0f so that a linear ten]perature gradient can be Inaintained along the chr0nat0graphic colurnn v hile the invention has been described in conjunction With a present preferred embodi[nent, it Should be evident that it is n0t limited thereto vvhat is caimed iS:

1. A ther[nochr0mat0graphic analyzer comprising an elongated conduit containing a Inaterial Which Selectively retards passage therethrough of the constituents of a nuid Titure t0 be analyzed, means t() introduce a Huid mixture to be analyzed into one end of said c0lumn, an elongated member of heat conductive Inaterial having a central opening therethrough 0ngitudina"y of Said member, Said member encsing said conduit, a Hrst heating eement in thermal contact With one end of said member, a Second heating eement in thermal contact vith the Second end of Said Inember, heat insulating material Surr0unding Said member, a third heating eement having a central 0DF" ng herethrough, heat insulating means positioning Said third heating element in spaced reationship fron1 Said one end of said member longitudinally thereof S0 as t0 Surround Said conduit, a fourth heating element having a central opening therethrough, heat insl1ating nleans p0sitioning Said fourth heating element in Spaced relationship fr0n Said second end of Said Inember longitudinauy there0f, S0 as to surround Said conduit, means to Inove said nlember and Sajd third and fourth heating ele ments 10ngitudinany along a SubStantial lengh 0f Said conduit so as t() Selectively inpel said mixture there through, and Ineans to detect the constituents in the ef nuent fron1 the second end of Said column, Said second elenent being at a higher temperature than that of Said rst element, said third elelnent being at a ternperature at I10St about that of sa...d f...r3; clement, and Said fourth element being at a temperature substantiany higher than that of Said Second element.

2' A hermochron]at0graphic analyzer c0mpiSing an elongated conduit containing a material vvhich Selectively retards passage therethrough of the constituents of a nuid Inixture to be analyzed, Ineans t0 introduce a Huid mixtu1'e to be analyzed int0 0ne end of said column, an elongated member of heat conductive material having a central opening therethrough longitudinany of Said nenTber, said member enc10sing said conduit, a first heating element in thermal contact with one end of said member, a second heating element in thernal contact -vith the second end of Said Inefnber, a rSt temperature sensing Ineans in thernal contact vvith said one end of Said I!eber !eans responsive to Said fil'st tenperature sensing nleans to Sup ply a heating nlediun to said 1St hating element at a rate S0 aS to main ain said one end 0 Said member lt a rst predetermined emperature, a second temperaure sensing means in thernal contact Vith Said second end of said member, means responsive to Said second temper ature Sensing means to Supply a heating Inedium 0 Said Second heating elemen at a rate S0 as to nlaintain said Second Gnd of said n]ember at a Second predeternTined temperaure, a third heating element having a central opening therethrough, heat insulating Ineans p0sitioning said third heaing elemen in Spaced relati0nship fr0m said one end of Said member longiudinaly thereof So aS 0 Surround Said conduit, a third temperature sensing means in thermal contact With Said third heating elenent, means responsive to Said third temperature sensing means to Supply a heating n1edium to Said third heating element at a Tate S0 as to maintain the region Of Said third heat ing element at a third predetermined temperature, a fourth heating element having a centra 0pening here !hrough, heat insulating means positioning Said fourth heating element in Spaced relationship from Said second end of said men1ber l0ngitudinaly there0f S0 aS t0 Sur round Said conduit, a fourth temperaure Sensing Ineans in thermal contact With Said fourh heating element, means resp0nsive t0 Said fourth temperatue sensing Ineans to Supply a heating medium to Said fourth heating element at a rate S0 as t0 Inaintain the region of Said fourth heating element at a fourth pledeterInined tenlperature, a fifth heating element in thermal contact With Said Il l(ml)el interlediate the ends there0f, a fifth ten1- perature sensing means in thermal contact with Said member intern1ediate the ends there0f, Ineans responsive t0 Said fth temperature sensing nleans to supply a heating n1edium to said fifth heating elenent at a rate So aS to maintain the region of Said member intermediate the endS there0f at a fifth predeternined temperature, heat insulating material surrounding said member, nleans to n10ve said n1enlber and Said heating elenlents longitudinally along a substantial length of Said conduit so as to Selectively impel Said mixture therethrough, and Ineans t0 detect the constituent8 in the eHuent from the Second end of Said c0lumn, said Second temperature being higher than Said rSt temperature, Said third temperature being at most about that of said iirst temperature, said fourth temperature being substantially higher than said second Tnperature and said nfth temperature being i1ern1ediate said rst and Said second temperatueS.

2 279,368 Dietert Apr 14 1942 Z 398 818 Turner p1 23 1946 z,491.zlo lennie Dec. 13, 1949 z,743,99j Sherrick May l 19j6 2,8Zo l32 Krause an' 14, 19j8 z 826 908 skamtrom Mar. 18, l98 

